epic-ts

[kivitendo-erp.git] / SL / RecordLinks.pm

diff --git a/SL/RecordLinks.pm b/SL/RecordLinks.pm
index c504998..77086ba 100644 (file)
--- a/SL/RecordLinks.pm
+++ b/SL/RecordLinks.pm
@@ -1,7 +1,12 @@
 package RecordLinks;
 
+use utf8;
+use strict;
+
 use SL::Common;
 use SL::DBUtils;
+use Data::Dumper;
+use List::Util qw(reduce);
 
 sub create_links {
   $main::lxdebug->enter_sub();
@@ -130,8 +135,8 @@ sub get_links_via {
   my $myconfig   = \%main::myconfig;
   my $form       = $main::form;
 
-  my $last_hop = shift @hops;
-  my @links    = undef;
+  my $last_hop   = shift @hops;
+  my @links;
   for my $hop (@hops) {
 
     my @temp_links = $self->get_links(
@@ -141,25 +146,136 @@ sub get_links_via {
       to_id      => $hop->{id},
     );
 
-    if (@links) {
-      @links = grep { $_ }
-               cross {
-                 if (   $a->{to_table} eq $b->{from_table}
-                     && $a->{to_id}    eq $b->{from_id} ) {
-                   +{ $a->{from_table}, $a->{from_id},
-                      $b->{to_table},   $b->{to_table} }
-                 }
-              } @links, @temp_links;
-    } else {
-      @links = @temp_links;
-    }
+    # short circuit if any of these are empty
+    return wantarray ? () : [] unless scalar @temp_links;
 
-    $last_hop = $hop;
+    push @links, \@temp_links;
+    $last_hop  =  $hop;
   }
 
+  my $result = reduce {
+    [
+      grep { $_ }
+      cross {
+        if (   $a->{to_table} eq $b->{from_table}
+            && $a->{to_id}    eq $b->{from_id} ) {
+          +{ from_table => $a->{from_table},
+             from_id    => $a->{from_id},
+             to_table   => $b->{to_table},
+             to_id      => $b->{to_id} }
+          }
+        } @{ $a }, @{ $b }
+    ]
+  } @links;
+
   $main::lxdebug->leave_sub();
 
-  return wantarray ? @links : \@links;
+  return wantarray ? @{ $result } : $result;
+}
+
+sub delete {
+  $main::lxdebug->enter_sub();
+
+  my $self     = shift;
+  my %params   = @_;
+
+  Common::check_params(\%params, [ qw(from_table from_id to_table to_id) ]);
+
+  my $myconfig   = \%main::myconfig;
+  my $form       = $main::form;
+
+  my $dbh        = $params{dbh} || $form->get_standard_dbh($myconfig);
+
+  # content
+  my (@where_tokens, @where_values);
+
+  for my $col (qw(from_table from_id to_table to_id)) {
+    add_token(\@where_tokens, \@where_values, col => $col, val => $params{$col}) if $params{$col};
+  }
+
+  my $where = @where_tokens ? "WHERE ". join ' AND ', map { "($_)" } @where_tokens : '';
+  my $query = "DELETE FROM record_links $where";
+
+  do_query($form, $dbh, $query, @where_values);
+
+  $dbh->commit() unless ($params{dbh});
+
+  $main::lxdebug->leave_sub();
 }
 
 1;
+
+__END__
+
+=head1 NAME
+
+SL::RecordLinks - Verlinkung von kivitendo Objekten.
+
+=head1 SYNOPSIS
+
+  use SL::RecordLinks;
+
+  my @links = RecordLinks->get_links(
+    from_table => 'ar',
+    from_id    => 2,
+    to_table   => 'oe',
+  );
+  my @links = RecordLinks->get_links_via(
+    from_table => 'oe',
+    to_id      => '14',
+    via        => [
+      { id => 12 },
+      { id => 13},
+    ],
+  );
+
+  RecordLinks->create_links(
+    mode       => 'ids',
+    from_table => 'ar',
+    from_id    => 1,
+    to_table   => 'oe',
+    to_ids     => [4, 6, 9],
+  )
+  RecordLinks->create_links(@links);
+
+  delete
+
+=head1 DESCRIPTION
+
+Transitive RecordLinks mit get_links_via.
+
+get_links_via erwartet den zusätzlichen parameter via. via ist ein
+hashref mit den jeweils optionalen Einträgen table und id, die sich
+genauso verhalten wie die from/to_table/id werte der get_links funktion.
+
+Alternativ kann via auch ein Array dieser Hashes sein:
+
+  get_links_via(
+    from_table => 'oe',
+    from_id    => 1,
+    to_table   => 'ar',
+    via        => {
+      table      => 'delivery_orders'
+    },
+  )
+
+  get_links_via(
+    from_table => 'oe',
+    to_id      => '14',
+    via        => [
+      { id => 12 },
+      { id => 13},
+    ],
+  )
+
+Die Einträge in einem via-Array werden exakt in dieser Reihenfolge
+benutzt und sind nicht optional. Da obige Beispiel würde also die
+Verknüpfung:
+
+  oe:11 -> ar:12 -> is:13 -> do:14
+
+finden, nicht aber:
+
+  oe:11 -> ar:13 -> do:14
+
+=cut